To get a trial key
fill out the form below
Team License (a basic version)
Enterprise License (an extended version)
* By clicking this button you agree to our Privacy Policy statement

Request our prices
New License
License Renewal
--Select currency--
USD
EUR
GBP
RUB
* By clicking this button you agree to our Privacy Policy statement

Free PVS-Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
V120. Member operator[] of object 'foo'…
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
OWASP errors (C#)
Additional information
Contents

V120. Member operator[] of object 'foo' is declared with 32-bit type argument, but is called with memsize type argument.

Dec 15 2011

The analyzer detected a potential error of working with classes that contain operator[].

Classes with an overloaded operator[] are usually a kind of an array where the index of the item being called is operator[] argument. If operator[] has a 32-bit type formal argument but memsize-type is used as an actual argument, it might indicate an error. Let us consider an example leading to the warning V120:

class MyArray {
  int m_arr[10];
public:
  int &operator;[](unsigned i) { return m_arr[i]; }
} Object;
size_t k = 1;
Object[k] = 44; //V120

This example does not contain an error but might indicate an architecture shortcoming. You should either work with MyArray using 32-bit indexes or modify operator[] so that it takes an argument of size_t type. The latter is preferable because memsize-types not only serve to make a program safer but sometimes allow the compiler to build a more efficient code.

The related diagnostic warnings are V108 and V302.

This website uses cookies and other technology to provide you a more personalized experience. By continuing the view of our web-pages you accept the terms of using these files. If you don't want your personal data to be processed, please, leave this site.
Learn More →
Accept